Problem in datagrid

1

Hi All,
I am new in action script… i need help from you…
i have the problem in datagrid… The problem is i inserted a array values into datagrid using dataprovider .The datagrid contains three columns . The columns are automatically change the column order for example…
first column : ID
second column : Name
Third column ; Place
i assign a values to datagrid like above… but the changes the column order automatically run this code whenever… like 1st coumn : Name 2nd column ; Place 3rd Column :ID … next time 1st coumn : ID 2nd column ; Place 3rd Column :Name

              thanks in advance....